fix: update landing page navigation links

Updated navigation links to point to actual pages:
- Docs link now goes to /docs/getting-started/introduction
- GitHub link now points to the actual repository
- Get Started button also links to introduction page
- Logo link updated to return to home page

All links now functional instead of placeholder anchors.

Author: claude

src/app/page.tsx

@@ -6,16 +6,16 @@ export default function HomePage() {
       <header className="landing-header">
         <div className="landing-container">
           <nav className="landing-nav">
-            <a href="#" className="landing-logo">
+            <a href="/" className="landing-logo">
               <div className="logo-mark"></div>
               EmberDocs
             </a>
             <ul className="nav-links">
               <li><a href="#features">Features</a></li>
-              <li><a href="#docs">Docs</a></li>
-              <li><a href="#github">GitHub</a></li>
+              <li><a href="/docs/getting-started/introduction">Docs</a></li>
+              <li><a href="https://github.com/sturdy-barnacle/emberdocs" target="_blank" rel="noopener noreferrer">GitHub</a></li>
             </ul>
-            <a href="#" className="btn btn-primary">Get Started →</a>
+            <a href="/docs/getting-started/introduction" className="btn btn-primary">Get Started →</a>
           </nav>
         </div>
       </header>